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      03-23-2018, 03:24 PM   #45
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@bimmer4life24 I had the same setup in mind as @alscks0414 but with 437. Unfortunately today I found out that I'll have to stick with stock size. I called a professional installer and they explained to me how the laws are still quite strict here in Italy. The car comes with a registration certificate that lists the allowed tires and the process to re-certify with a custom size is extremely obnoxious. I could just do it and ignore all that, but in practice I risk insurance not covering, in case they found the car with non-certified tires. This could get ugly very fast. I figured eventually I could keep a 'trackday' set in that size and swap at the track.
I hope you have better flexibility in Canada. Go for the 255/275.
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      03-23-2018, 03:42 PM   #46
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Quote:
Originally Posted by pmilani View Post
@alscks0414 I had the same setup in mind. Unfortunately today I found out that I'll have to stick with stock size. I called a professional installer and they explained to me how the laws are still quite strict here in Italy. The car comes with a registration certificate that lists the allowed tires and the process to re-certify with a custom size is extremely obnoxious. I could just do it and ignore all that, but in practice I risk insurance not covering, in case they found the car with non-certified tires. This could get ugly very fast. I figured eventually I could keep a 'trackday' set in that size and swap at the track.
I hope you have better flexibility in Canada. Go for the 255/275.
Mamma mia

That's strict.
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      03-31-2018, 05:47 PM   #47
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Quote:
Originally Posted by Doji desu View Post
Just fitted PS4S in 255/275 on stock wheels with stock suspension. No rub or any detrimental effects which is what others have mentioned. I guarantee the green Michelins have more grip than the Contis they replaced which were still very legal. Good riddance to bad rubbish as my Gran would say!

Edit: I bought the tyres online and one of the approved fitting stations was a local BMW dealer though not the one I bought the car from. When I picked up the car the service rep said you do know these are bigger than standard and I said yes, I ordered them that size. No other comment.

The invoice has written:

"TYRES FITTED TO VEHICLE LARGER THAN ORIGINALLY EQUIPPED. ****** BMW CANNOT BE HELD LIABLE FOR ANY DEVIATIONS IN DISPLAYED SPEED, ABS, OR DSC OPERATION."

Arse covering much. Wonder what they would have done if I went 275/30 and 295/30 as others on here have done?
Any pics of the car with the larger rubber on? Would love to see how the stance looks. Any changes to the handling? Is tramlining more apparent?
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      04-01-2018, 06:31 AM   #48
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Quote:
Originally Posted by M2audioman View Post
Any pics of the car with the larger rubber on? Would love to see how the stance looks. Any changes to the handling? Is tramlining more apparent?
No changes other than more grip. No tramlining and the roads here cause tramlining if the setup isn't right.

Will take some pics tomorrow, it's night now...

To my eye they look to have more sidewall than just the extra 35% of the 10mm extra width. I put this down to the removal of the stretch.

Will dig out some old before shots too.

Edit. Sorry lousy shots, too late and the car is filthy, lots of rain at the moment.








Last edited by Doji desu; 04-16-2018 at 02:43 AM..
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      06-24-2018, 05:02 PM   #49
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Quote:
Originally Posted by Doji desu View Post
No changes other than more grip. No tramlining and the roads here cause tramlining if the setup isn't right.
Will take some pics tomorrow, it's night now...
To my eye they look to have more sidewall than just the extra 35% of the 10mm extra width. I put this down to the removal of the stretch.
Will dig out some old before shots too.
Edit. Sorry lousy shots, too late and the car is filthy, lots of rain at the moment.
[PICTURES]
Did you ever get around to taking and uploading your photo's?

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      06-24-2018, 06:43 PM   #50
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For clarification, I did not see it mentioned previously, the sidewall measurement on a tire (the second number) is the ASPECT RATIO, hence a "35" is 35% of the width, hence increase in width correlates to increase in height or overall diameter
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      12-27-2018, 06:55 AM   #51
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255/35 & 275/35 in R19 seem to be OEM in some countries ...

http://www2.bmw.com.au/spec-guide/bmw-m2-spec-guide.pdf


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      12-27-2018, 07:33 AM   #52
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Quote:
Originally Posted by chiraoka View Post
255/35 & 275/35 in R19 seem to be OEM in some countries ...

http://www2.bmw.com.au/spec-guide/bmw-m2-spec-guide.pdf


CH
From Australia. Can confirm that this is a printing error. 245/265 tyres here for everyone.
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      12-29-2018, 09:06 PM   #53
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I'm pretty sure the ABS wheel speed sensors will compensate for changes in rolling diameter so I wouldn't worry about any issues going with the M3/M4 OEM tire size.
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      12-30-2018, 04:03 AM   #54
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Would 255/35/19; 275/35/19 437Ms work on an M2C?
I thought I read some M2C owners rubbing in the front with 255/35/19?
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      12-31-2018, 11:45 AM   #55
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Quote:
Originally Posted by Kief View Post
Would 255/35/19; 275/35/19 437Ms work on an M2C?
I thought I read some M2C owners rubbing in the front with 255/35/19?
I thought the 437M wheel/tire set up is a no-cost option for the M2C?
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      12-31-2018, 11:56 AM   #56
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Quote:
Originally Posted by gsrbri View Post
I thought the 437M wheel/tire set up is a no-cost option for the M2C?
It is, but not here in the States; at least not yet
I should have added, 437M with 245; 265/35/19
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      01-08-2019, 06:31 PM   #57
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Quote:
Originally Posted by Kief View Post
Would 255/35/19; 275/35/19 437Ms work on an M2C?
I thought I read some M2C owners rubbing in the front with 255/35/19?
I’m running 255/35-19f & 275/35-19r RE-71Rs on my 788s. No rubbing.
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      01-09-2019, 11:08 AM   #58
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Quote:
Originally Posted by Old Geezer View Post
I’m running 255/35-19f & 275/35-19r RE-71Rs on my 788s. No rubbing.
Thanks
I ended up getting an M3CS instead
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      01-12-2019, 07:05 PM   #59
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M2C with 255/35-19 and 275/35-19 MP4S. Much better fitment than the stock tires. Sorry for the dirty car!







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      01-13-2019, 07:22 AM   #60
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Quote:
Originally Posted by Old Geezer View Post
I’m running 255/35-19f & 275/35-19r RE-71Rs on my 788s. No rubbing.
Are you using the RE-71R for normal street duty? I hate the "sizzle" of the RE-71R over certain types of pavement and over all lane markings, etc (tire engineer speak for the trapped compression of air in tread) in addition to all the other road noise they create. I have a set for my E90 M3 I use for events only, and switching back to the regular street wheels/tires (PS4S) is an amazing transformation for normal street driving (much quieter, more comfortable, but still great street performance).
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      01-13-2019, 12:47 PM   #61
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Quote:
Originally Posted by Aust350z View Post
From Australia. Can confirm that this is a printing error. 245/265 tyres here for everyone.
Yes, printing error, they recycle the manual from the M3 and modify it for the M2. My 1M manual said my car came with a high performance V8. The BMW website said the 1M came with dual disc clutch. On ED I met with head of M Germany and asked him. He confirmed that it was a mistake and had the website fixed to say dual mass flywheel.

With all that said, what caught my attention is that I want to go with 18" wheels. They are more go than the 19s for show and perform better on bad roads. However the wheels I like only come in 9.5" wide front and 10.5" rear. Everyone goes with smaller diameter 265 and 285s but I don't like that. That is great for normally aspirated high revving cars that need to spool up quickly but in our cars with big torque we are actually shortening up the powerband a bit and recording extra miles on the car due to the smaller diameter.

The more appropriate 275 and 295 sizes are marginal, can rub and the extra weight can blunt performance. So I was also thinking slightly larger diameter M3 sizes 255-40-18 and 275-40-18 might be the best compromise but I have not found anyone to have run this yet and it would be an expensive test.

The F80 M3s run these sizes and use the same offsets so it would be a simple test for you to find someone with an M3 and just try these out on the M2. The car has enough torque for the slightly larger diameter and slightly heavier tire but my educated guess is that you really won't gain much since what makes the M2 special is the balance the M guys put into the car. Changing the tire sizes will probably upset that balance everyone raves about.
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      01-14-2019, 04:15 AM   #62
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Quote:
Originally Posted by billspreston View Post
M2C with 255/35-19 and 275/35-19 MP4S. Much better fitment than the stock tires. Sorry for the dirty car!
Any rubbing?
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      01-14-2019, 03:53 PM   #63
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Quote:
Originally Posted by CSBM5 View Post
Are you using the RE-71R for normal street duty? I hate the "sizzle" of the RE-71R over certain types of pavement and over all lane markings, etc (tire engineer speak for the trapped compression of air in tread) in addition to all the other road noise they create. I have a set for my E90 M3 I use for events only, and switching back to the regular street wheels/tires (PS4S) is an amazing transformation for normal street driving (much quieter, more comfortable, but still great street performance).
Since nobody makes an SCCA BS-legal wheel setup yet, the RE-71Rs stay on my 788s full time. Being retired, the M2C doesnt get driven all that much between events. We have the other M2 for a DD.
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      01-14-2019, 09:42 PM   #64
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Various tire specs by: Tire/size/section width/tread width/diameter/revs per mile

OEM PS4S
245-35-19/ 9.8/8.6/25.8/807
265-35-19/10.7/9.6/26.3/790

OEM Conti
245-35-19/ 9.8/8.7/25.8/805
265-35-19/10.7/9.4/26.3/790

RE-71R
255-35-19/10.2/. 9.3/26.0/801
275-35-19/10.9/10.0/26.6/784
265-35-19/10.7/.9.6/26.3/791
285-35-19/11.4/10.1/26.8/775

18" Hankook R-S4
245-40-18/10.1/9.1/25.6/811
265-40-18/11.0/9.7/26.2/793

Notes:

1. Section width and tire diameter can create rubbing issues.

2. Taller tire diameter with lower revs per mile impacts gearing and speedo accuracy.
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      01-15-2019, 11:21 AM   #65
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Quote:
Originally Posted by chris719 View Post
Any rubbing?
No rubbing with the 255/275 MP4S.
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      01-27-2019, 07:40 PM   #66
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Quote:
Originally Posted by nachob View Post
The more appropriate 275 and 295 sizes are marginal, can rub and the extra weight can blunt performance. So I was also thinking slightly larger diameter M3 sizes 255-40-18 and 275-40-18 might be the best compromise but I have not found anyone to have run this yet and it would be an expensive test.

The F80 M3s run these sizes and use the same offsets so it would be a simple test for you to find someone with an M3 and just try these out on the M2. The car has enough torque for the slightly larger diameter and slightly heavier tire but my educated guess is that you really won't gain much since what makes the M2 special is the balance the M guys put into the car. Changing the tire sizes will probably upset that balance everyone raves about.
I'm running 255 and 275/40/18 on stock suspension with no issues!
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